Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

bmelyk

  • 2 years ago

I just wanna get my answer checked:

  • This Question is Closed
  1. bmelyk
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    The height at time t (s) of a weight, oscillating up and down at the end of a spring is given below. s(t) = 400 + 90sin(t)

  2. bmelyk
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    a) Find the velocity at t = π/3 s. b) Find the acceleration at t = π/3 s

  3. bmelyk
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so for a) my equation i had was 90sin(t) and b) 90cos(t)

  4. bmelyk
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    wondering if those are right.

  5. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    for velocity, u differentiate once, for acceleration, u differentiate twice.

  6. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so NO

  7. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    first derivative of s(t) = 400 + 90sin(t) is ??

  8. bmelyk
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    90cos(t) ??

  9. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes, thats your velocity

  10. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    and acceleration ?

  11. bmelyk
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    -90sin(t)

  12. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thats correct also :)

  13. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    now just put t values

  14. bmelyk
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so the answers are: A) 45 b) -45 sqrt3 ???

  15. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes.

  16. bmelyk
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    woo hoooo. : )

  17. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.